K-50 Drain Cleaning Machine 4. Attach the rear guide hose by lifting up the lock pin and sliding guide hose adapter onto the housing until it locks into place (Figure 2). Do not use machine without rear guide hose attached. Prevents cable whipping and possible entanglement. WARNING 5. Insert first cable into front of machine (female end first) and push through guide hose until approximately one foot remains out the front of the machine (Figure 3).